GitLab

When a user alt-tabs they can only navigate the window cycle list using
the keyboard.

To make this feature more interactive, this CL adds mouse behaviour to
the window cycle list. This CL makes it so when a user hovers over an
item, the focus ring follows the mouse. Also when a user presses on an
item, it closes the window cycle list and activates the corresponding
window.

Test: WindowCycleControllerTest.MouseHoverAndSelect
Bug: 1067327
Change-Id: I293d0416fbf764ddfb0116f65a33c17f288f646a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2357329Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Commit-Queue: Jeremy Chinsen <chinsenj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800347}